Irahof, T. A. 1975. The changing seasons; the spring migration: April 1-May 

 31, 1975; Central Southern Region. Am. Birds 29: 862-867. 



. 1976a. The changing seasons; the spring migration: April 1-May 31, 



1976; Central Southern Region. Am. Birds 30: 851-855. 



. 1976b. Alabama birds. Second ed . Univ. Alabama Press, University, 



AL. xv and 445 pp. 



. 1978. The changing seasons; the spring migration: April 1-May 31, 



1978; Central Southern Region. Am. Birds 32: 1017-1021. 



. 1979. The changing seasons; the spring migration: March 1-May 31, 



1979; Central Southern Region. Am. Birds 33: 779-781. 



International Council for Bird Protection, British Section (ICBP). 1960. 

 Pp. 16-21 in Annual Report for 1960. London, England. 



Jackson, J. A. (comp.). 1976. Birds around the state. Mississippi Kite 6: 

 14-19. 



Jackson, J. A. and C. D. Cooley (comps.). 1978a. Birds around the state - 

 December 1977 through November 1978. Mississippi Kite 8: 48-64. 



. 1978b. The changing seasons; the nesting season: June 1-July 31, 1978; 



Central Southern Region. Am. Birds 32: 1171-1175. 



Jackson, J. A. and W. C. Weber (comps.). 1976. Birds around the state. Mis- 

 sissippi Kite 6: 47-54. 



. 1977. Birds around the state - winter 1976-77. Mississippi Kite 7: 



27-31. 



Joensen, A. H. 1972a. Oil pollution and seabirds in Denmark 1935-1968. Dan. 

 Rev. Game Biol. 6 No. 8: 1-24. 



. 1972b. Studies on oil pollution and seabirds in Denmark 1968-1971. 



Dan. Rev. Game Biol. 6 No. 9: 1-32. 



. 1973. Danish seabird disasters in 1972. Mar. Pollut. Bull. 4: 



117-118. 



Joensen, A. H. and E. B. Hansen. 1977. Oil pollution and seabirds in Denmark 

 1971-1976. Dan. Rev. Game Biol. 10 No. 5. 31 pp. 



Johnsgard, P. A. 1975. Waterfowl of North America. Indiana Univ. Press, 

 Blooming ton, IN. 575 pp. 



. 1978. Ducks, geese and swans of the world. Univ. Nebraska Press, 



Lincoln, NB. 404 pp. 



478 



